[private brand checks] Ship --harmony-private-brand-checks

I2S: https://groups.google.com/a/chromium.org/g/blink-dev/c/SO8zL3dvKsI/m/wMg-UGOUAgAJ

Bug: v8:11374
Change-Id: If25136f457ba15b7647b383d1e057e5ee4e8266f
Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/2745143Reviewed-by: Shu-yu Guo <syg@chromium.org>
Commit-Queue: Marja Hölttä <marja@chromium.org>
Cr-Commit-Position: refs/heads/master@{#73347}

src/flags/flag-definitions.h

@@ -270,7 +270,6 @@ DEFINE_IMPLICATION(harmony_weak_refs_with_cleanup_some, harmony_weak_refs)
 #define HARMONY_STAGED_BASE(V)                                              \
   V(harmony_top_level_await, "harmony top level await")                     \
   V(harmony_relative_indexing_methods, "harmony relative indexing methods") \
-  V(harmony_private_brand_checks, "harmony private brand checks")           \
   V(harmony_class_static_blocks, "harmony static initializer blocks")
 
 #ifdef V8_INTL_SUPPORT
@@ -290,7 +289,8 @@ DEFINE_IMPLICATION(harmony_weak_refs_with_cleanup_some, harmony_weak_refs)
   V(harmony_string_replaceall, "harmony String.prototype.replaceAll") \
   V(harmony_logical_assignment, "harmony logical assignment")         \
   V(harmony_atomics_waitasync, "harmony Atomics.waitAsync")           \
-  V(harmony_regexp_match_indices, "harmony regexp match indices")
+  V(harmony_regexp_match_indices, "harmony regexp match indices")     \
+  V(harmony_private_brand_checks, "harmony private brand checks")
 
 #ifdef V8_INTL_SUPPORT
 #define HARMONY_SHIPPING(V) HARMONY_SHIPPING_BASE(V)